Registration Dossier
Registration Dossier
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EC number: 603-007-2 | CAS number: 124728-81-0
Endpoint summary
Administrative data
Key value for chemical safety assessment
Genetic toxicity in vitro
Description of key information
Based on the results of the bacterial reverse mutation assay (OECD 471) the test item is not considered to be mutagenic.
Link to relevant study records
- Endpoint:
- in vitro gene mutation study in bacteria
- Remarks:
- Type of genotoxicity: gene mutation
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 07.11.2000- 15.03.2001
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 471 (Bacterial Reverse Mutation Assay)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method B.13/14 (Mutagenicity - Reverse Mutation Test Using Bacteria)
- Deviations:
- no
- Principles of method if other than guideline:
- None
- GLP compliance:
- yes (incl. QA statement)
- Type of assay:
- bacterial reverse mutation assay
- Specific details on test material used for the study:
- Batch: E00638445
- Target gene:
- HIS operon (S. thyphimurium)TRY operon (E. coli)
- Species / strain / cell type:
- S. typhimurium TA 1535
- Details on mammalian cell type (if applicable):
- his G 46, uvrB, rfa
- Additional strain / cell type characteristics:
- other: mutations in the histidine operon
- Species / strain / cell type:
- S. typhimurium TA 1537
- Details on mammalian cell type (if applicable):
- his C 3076, uvrB, rfa
- Additional strain / cell type characteristics:
- other: mutations in the histidine operon
- Species / strain / cell type:
- S. typhimurium TA 98
- Details on mammalian cell type (if applicable):
- his D 3052, uvrB, rfa + R-factor
- Additional strain / cell type characteristics:
- other: mutations in the histidine operon
- Species / strain / cell type:
- S. typhimurium TA 100
- Details on mammalian cell type (if applicable):
- his G 46, uvrB, rfa + R-factor
- Additional strain / cell type characteristics:
- other: mutations in the histidine operon
- Species / strain / cell type:
- S. typhimurium TA 102
- Details on mammalian cell type (if applicable):
- his G 428, rfa + R-factor
- Additional strain / cell type characteristics:
- other: mutations in the histidine operon
- Species / strain / cell type:
- E. coli WP2 uvr A
- Details on mammalian cell type (if applicable):
- his C 3076, uvrB, rfa
- Additional strain / cell type characteristics:
- other: mutations in the tryptophan operon
- Metabolic activation:
- with and without
- Metabolic activation system:
- rat liver homogenate (S9 mix) with standard co-factors with metabolic activation (Aroclor)
- Test concentrations with justification for top dose:
- In the pre-experiment the concentration range of the test substance was 3 - 5000 μg/plate. The pre-experiment is reported as experiment 1 and 5000 μg/plate was chosen as the highest concentration.
The concentration range included two logarithmic decades. The following concentrations were tested: 33; 100; 333; 1000; 2500; and 5000 μg/plate. - Vehicle / solvent:
- THF (> 99 %)
- Untreated negative controls:
- no
- Negative solvent / vehicle controls:
- yes
- Positive controls:
- yes
- Positive control substance:
- sodium azide
- methylmethanesulfonate
- other: 2-aminoanthracene, 4-nitro-o-phenylene-diamine
- Evaluation criteria:
- A test item is considered as a mutagen if a biologically relevant increase in the number of revertants exceeding the threshold of twice (strains TA 98, TA 100, and TA 102) or thrice (strains TA 1535 and TA 1537) the colony count of the corresponding solvent control is
observed.
A dose dependent increase is considered biologically relevant if the threshold is exceeded at more than one concentration.
An increase exceeding the threshold at only one concentration is judged as biologically relevant if reproduced in an independent second experiment.
A dose dependent increase in the number of revertant colonies below the threshold is regarded as an indication of a mutagenic potential if reproduced in an independent second experiment. However, whenever the colony counts remain within the historical range - Statistics:
- No statistical evaluation of the data is required.
- Key result
- Species / strain:
- S. typhimurium TA 1535
- Metabolic activation:
- with and without
- Genotoxicity:
- negative
- Cytotoxicity / choice of top concentrations:
- no cytotoxicity
- Vehicle controls validity:
- valid
- Untreated negative controls validity:
- valid
- Positive controls validity:
- valid
- Key result
- Species / strain:
- S. typhimurium TA 98
- Metabolic activation:
- with and without
- Genotoxicity:
- negative
- Cytotoxicity / choice of top concentrations:
- no cytotoxicity
- Vehicle controls validity:
- valid
- Untreated negative controls validity:
- valid
- Positive controls validity:
- valid
- Key result
- Species / strain:
- S. typhimurium TA 1537
- Metabolic activation:
- with and without
- Genotoxicity:
- negative
- Cytotoxicity / choice of top concentrations:
- no cytotoxicity
- Vehicle controls validity:
- valid
- Untreated negative controls validity:
- valid
- Positive controls validity:
- valid
- Key result
- Species / strain:
- S. typhimurium TA 100
- Metabolic activation:
- with and without
- Genotoxicity:
- negative
- Cytotoxicity / choice of top concentrations:
- no cytotoxicity
- Vehicle controls validity:
- valid
- Untreated negative controls validity:
- valid
- Positive controls validity:
- valid
- Key result
- Species / strain:
- S. typhimurium TA 102
- Metabolic activation:
- with and without
- Genotoxicity:
- negative
- Cytotoxicity / choice of top concentrations:
- no cytotoxicity
- Vehicle controls validity:
- valid
- Untreated negative controls validity:
- valid
- Positive controls validity:
- valid
- Key result
- Species / strain:
- E. coli WP2 uvr A
- Metabolic activation:
- with and without
- Genotoxicity:
- negative
- Cytotoxicity / choice of top concentrations:
- no cytotoxicity
- Vehicle controls validity:
- valid
- Untreated negative controls validity:
- valid
- Positive controls validity:
- valid
- Conclusions:
- In conclusion, the test substance did not induce gene mutations under the experimental conditions reported. The test material was, thus, non-mutagenic in this Salmonella typhimurium and Escherichia coli reverse mutation assay.
Reference
Endpoint conclusion
- Endpoint conclusion:
- no adverse effect observed (negative)
Genetic toxicity in vivo
Endpoint conclusion
- Endpoint conclusion:
- no study available
Additional information
The mutagenic potential of the test item was investigated in a GLP conform study according to OECD Guideline 471. The test item did not induce an increase in revertant colony numbers in any of the strains tested. Thus, the test item is not considered to be mutagenic.
Justification for classification or non-classification
Based on the available information the test item is not considered to be mutagenic according to Regulation (EC) No 1272/2008.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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